I totally recreated the pattern I had for the octopus complied with my limited knowledge of crochet stitches to make this little guy! It was a a lot of splicing for the old pattern and way too much math....

about 9 inches from top of head to longest tentacle, and 5" when sitting on bottom.

not too complicated, actually. I had a pattern for an octopus and just changed some stuff up and walah! I was surprised how simple it ended up being. But I guess it depends on how well you can crochet how hard it would be, but I'm not advanced in any way. More like "experienced beginner".